To sum up the memo (available here) it says that the US can target a citizen for death if they believe a threat to be “imminent” even when no threat is immediately present. The citizen must have been involved in “activities”, but doesn’t define “activities,” and it’s not up to the US to prove that the citizen is a imminent threat, no…instead the citizen must prove to one sole government official that he has renounced and abandoned the “activities”

Remember the wails, screams, protests, endless newscasts and so on when Bush just detained and eavesdropped on Americans.